CN107327157A - Concrete floor ruggedized construction - Google Patents
Concrete floor ruggedized construction Download PDFInfo
- Publication number
- CN107327157A CN107327157A CN201710784608.1A CN201710784608A CN107327157A CN 107327157 A CN107327157 A CN 107327157A CN 201710784608 A CN201710784608 A CN 201710784608A CN 107327157 A CN107327157 A CN 107327157A
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- Prior art keywords
- concrete
- girder
- concrete floor
- bar
- reinforced concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000004567 concrete Substances 0.000 title claims abstract description 68
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 32
- 239000011378 shotcrete Substances 0.000 claims abstract description 18
- 239000007921 spray Substances 0.000 claims description 21
- 238000005507 spraying Methods 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 13
- 229920002748 Basalt fiber Polymers 0.000 claims description 11
- 210000003205 muscle Anatomy 0.000 claims description 10
- 240000002853 Nelumbo nucifera Species 0.000 claims description 9
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 9
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 9
- 238000010348 incorporation Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 210000002435 tendon Anatomy 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000010422 painting Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000009877 rendering Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000003359 percent control normalization Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 241001163600 Bathylaco nigricans Species 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0237—Increasing or restoring the load-bearing capacity of building construction elements of storey floors
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a kind of concrete floor ruggedized construction, it is characterized in that below concrete floor arranged crosswise reinforced concrete girder, reinforced concrete girder stretches into 80~120mm of side bar；Oblique girder is arranged on from the original concrete floor span location in crosspoint 0.1~0.11；Deformed bar, a diameter of 12~14mm of deformed bar is disposed below in concrete floor, and adjacent deformed bar spacing is 250~300mm, and deformed bar surface sets gunite concrete.
Description
Technical field
The present invention relates to a kind of concrete floor ruggedized construction, it is adaptable to building field.
Background technology
Concrete floor is the main member of building structure, occurs being reinforced in the case that bearing capacity is inadequate, simultaneously
Because thickness of concrete floor is relatively thin, the rigidity of structure is low, and back-up coat is difficult to form entirety with original concrete floor, so
The integrated carrying ability for how lifting concrete floor is the problem that engineering staff faces.
The content of the invention
The present invention is to provide a kind of concrete floor ruggedized construction, solves traditional ruggedized construction integrated carrying ability bad
Problem.
The reinforced concrete girder of present invention arranged crosswise below concrete floor, reinforced concrete girder effectively subtracts
The span of concrete floor is lacked, while stress concentration phenomenon, therefore cloth occurs in the crossover sites in reinforced concrete girder
Put oblique girder dispersive stress to concentrate, reduce the maximal bending moment of reinforced concrete girder.Oblique girder can also be remarkably reinforced reinforcing
The integral rigidity of structure, lifts integrated carrying ability.Deformed bar and gunite concrete is disposed below in concrete floor, in advance
Stress reinforcing bar first bears the stress that original concrete floor is passed over due to prestressed reason, with original concrete building plate shape
Integral carrying.
The small depth of beam of reinforced concrete is 200~250mm, and width is 150~200mm, and reinforced concrete girder stretches into side
80~120mm of beam.Oblique small depth of beam is 200~250mm, and width is 150~200mm.Oblique girder set location is to reinforcing
The bending moment envelope diagram influence of concrete girder is larger, and progress simulation analysis of computer, table 1 are set to the diverse location of oblique girder
For Moment Influence of the oblique girder set location to reinforced concrete girder, according to simulation analysis of computer result, oblique girder
It is arranged on from the original concrete floor span location in crosspoint 0.1~0.11.
Moment Influence of the oblique girder set location of table 1 to reinforced concrete girder
Deformed bar, a diameter of 12~14mm of deformed bar, adjacent deformed bar is disposed below in concrete floor
Spacing is 250~300mm, and deformed bar surface sets gunite concrete.
Stream pendant phenomenon occurs in concrete during construction of shotcrete, therefore fine in gunite concrete incorporation basalt
Dimension prevents this phenomenon, simultaneously because basalt fibre is higher than four orders of magnitude of cement tensile strength, gunite concrete tension is strong
Degree can be significantly improved, and the connection of newly-laid concrete and former concrete obtains obvious strengthen.But when basalt fibre incorporation
When measuring excessive, it may appear that the phenomenon that skewness even lumps.This is tested according to such case, table 2 is the Black Warrior
Rock fiber incorporation is with the distance and angle by spray plane with wind pressure parameter, and experiment is found when basalt fibre incorporation is more than
1.3%, concrete strength lifting change is little, comprehensive concrete topping situation, and it is 1.4% to determine basalt fibre incorporation.
The basalt fibre incorporation of table 2 is with the distance and angle by spray plane with wind pressure parameter
Construction procedure includes：
(1) rendering of original concrete floor is peeled off, and by original concrete floor bottom surface dabbing；
(2) by side bar and reinforced concrete girder handing-over position cut, install reinforced concrete girder reinforcing bar and
Template, the template of reinforced concrete girder will set the embedded hole for being easy to deformed bar to pass through, and embedded hole a diameter of 14~
16mm；
(3) reinforcing bar and template of oblique girder are installed, oblique girder, which is set, is easy to the embedded hole that deformed bar is passed through, in advance
Buried via diameter is 14~16mm；
(4) concrete of reinforced concrete girder and oblique girder is poured；
(5) deformed bar perforation is drilled with side bar deformed bar set location, penetration hole diameter is 14~16mm；
(6) prestressed reinforcing bar, the outside protective layer of side bar is peeled off, pressure-bearing steel plate is welded on to the reinforcing bar of side bar
On, presstressed reinforcing steel is fixed on through side bar perforation and reinforced concrete girder embedded hole or oblique girder embedded hole through anchor slab
Pressure-bearing steel plate；
(7) prestressed reinforcement of tensioning；Tension of prestressed tendon uses lever type clamping instrument, the resistance of lever type clamping instrument
The ratio of arm and power arm is 0.05~0.15；Tension of prestressed tendon is transverse stretching, i.e., tension of prestressed tendon direction is with advance should
Power muscle arranged direction is vertical, and tension of prestressed tendon is fixed after finishing with fixing muscle, and presstressed reinforcing steel is welded with fixing muscle, in advance should
Clogged using high-strength epoxy resin in space between the fixing hole of power muscle and concrete girder；
Deformed bar tension sequence is using as follows：By the control tension stress of deformed bar initial tensioning to 10%, hold
Lotus 3min sets up primary stress, then is stretched to 50% control tension stress, holds lotus 5min, and being finally stretched to control tensioning should
Power, holds lotus 5min.
(8) construction gunite concrete；
Spraying tool requirement can also be lifted after basalt fibre incorporation, only suitable equipment can just make basalt fibre
It is uniformly distributed, experiment discovery is relevant with jet thickness, when jet thickness is, less than 25mm, to be sprayed using screw spraying machine
Operation, the control of spraying machine wind pressure of work is in 0.15~0.3MPa, when jet thickness is, more than or equal to 25mm, to be sprayed using rotator type
Machine carries out spraying operation, and wind pressure of work is controlled in 0.3~0.4MPa.Nozzle and the distance and angle by spray plane, should be with blast
Fluctuation and constantly adjust.According to lot of experiments, nozzle is with the distance and angle by spray plane with wind pressure parameter using as follows：
The nozzle of table 3 is with the distance and angle by spray plane with wind pressure parameter
| Spraying machine wind pressure of work | Nozzle and the distance by spray plane | Nozzle and the angle by spray plane |
| 0.15 | 200 | 10 |
| 0.2 | 250 | 11 |
| 0.25 | 300 | 12 |
| 0.3 | 350 | 13 |
| 0.35 | 400 | 14 |
| 0.4 | 450 | 15 |
When spraying machine wind pressure of work is in the range of upper table, nozzle and the distance by spray plane and spray are determined using interpolation method
Mouth and the angle by spray plane.
(9) carry out painting smooth below gunite concrete.
Mechanical property of the present invention is good, and safe operation is reliable.
Brief description of the drawings
Fig. 1 is schematic diagram before concrete floor ruggedized construction prestressed stretch-draw, and Fig. 2 is that concrete floor ruggedized construction in advance should
Schematic diagram after power tensioning.
Reference：1st, reinforced concrete girder, 2, oblique girder, 3, presstressed reinforcing steel, 4, pressure-bearing steel plate, 5, anchor slab, 6,
Side bar, 7, concrete floor, 8, fixing muscle.
Embodiment
The present embodiment is described in detail below in conjunction with accompanying drawing.
The reinforced concrete girder 1 of the present embodiment arranged crosswise below concrete floor 7, reinforced concrete girder 1 is high
Spend for 250mm, width is 200mm, and reinforced concrete girder 1 stretches into side bar 120mm.The oblique height of girder 2 is 250mm, width
For 200mm.Oblique girder 2 is arranged on from the original span location of concrete floor 7 in crosspoint 0.11.
Deformed bar, a diameter of 14mm of deformed bar, adjacent deformed bar spacing is disposed below in concrete floor 7
For 300mm, deformed bar surface sets gunite concrete.
Gunite concrete thickness is 30mm, and gunite concrete mixes basalt fibre, and basalt fibre incorporation is
1.4%.
Construction procedure includes：
(1) rendering of original concrete floor 7 is peeled off, and by original bottom surface dabbing of concrete floor 7；
(2) side bar 6 is joined into position with reinforced concrete girder 1 to be cut, installs the reinforcing bar of reinforced concrete girder 1
And template, the template of reinforced concrete girder 1 will set embedded hole, a diameter of 16mm of embedded hole；
(3) reinforcing bar and template of oblique girder 2 are installed, oblique girder 2 sets embedded hole, a diameter of 16mm of embedded hole；
(4) concrete of reinforced concrete girder 1 and oblique girder 2 is poured；
(5) deformed bar perforation is drilled with the deformed bar set location of side bar 6, penetration hole diameter is 16mm；
(6) prestressed reinforcing bar, the outside protective layer of side bar 6 is peeled off, pressure-bearing steel plate 4 is welded on to the steel of side bar 6
On muscle, presstressed reinforcing steel 3 is through the perforation of side bar 6 and the embedded hole of reinforced concrete girder 1 or the embedded hole of oblique girder 2, through anchor slab 5
It is fixed on pressure-bearing steel plate 4；
(7) prestressed reinforcement of tensioning；The tensioning of presstressed reinforcing steel 3 uses lever type clamping instrument, the resistance of lever type clamping instrument
The ratio of the arm of force and power arm is 0.05~0.15；The tensioning of presstressed reinforcing steel 3 be transverse stretching, i.e. the tensioning direction of presstressed reinforcing steel 3 with
The arranged direction of presstressed reinforcing steel 3 is vertical, and the tensioning of presstressed reinforcing steel 3 is fixed after finishing with fixing muscle 8, and presstressed reinforcing steel 3 is carried out with fixing muscle 8
Clogged using high-strength epoxy resin in welding, the space between presstressed reinforcing steel 3 and the fixing hole of concrete girder；
Deformed bar tension sequence is using as follows：By the control tension stress of deformed bar initial tensioning to 10%, hold
Lotus 3min sets up primary stress, then is stretched to 50% control tension stress, holds lotus 5min, and being finally stretched to control tensioning should
Power, holds lotus 5min.
(8) construction gunite concrete；
Spraying operation is carried out using rotor spraying machine, wind pressure of work is controlled in 0.3~0.4MPa.Nozzle with by spray plane
Distance and angle, should constantly be adjusted with the fluctuation of blast.According to lot of experiments, nozzle and the distance and angle by spray plane
Use as follows with wind pressure parameter,
Nozzle is with the distance and angle by spray plane with wind pressure parameter
When spraying machine wind pressure of work is in the range of upper table, nozzle and the distance by spray plane and spray are determined using interpolation method
Mouth and the angle by spray plane.
(9) carry out painting smooth below gunite concrete.
Claims (6)
1. a kind of concrete floor ruggedized construction, it is characterized in that the reinforced concrete of arranged crosswise is small below concrete floor
Beam, the small depth of beam of reinforced concrete be 200~250mm, width be 150~200mm, reinforced concrete girder stretch into side bar 80~
120mm；Oblique small depth of beam is 200~250mm, and width is 150~200mm；Oblique girder be arranged on from crosspoint 0.1~
0.11 original concrete floor span location；
Deformed bar, a diameter of 12~14mm of deformed bar, adjacent deformed bar spacing is disposed below in concrete floor
For 250~300mm, deformed bar surface sets gunite concrete.
2. concrete floor ruggedized construction according to claim 1, it is characterized in that construction procedure includes：
(1) rendering of original concrete floor is peeled off, and by original concrete floor bottom surface dabbing；
(2) side bar is cut with reinforced concrete girder handing-over position, installs the reinforcing bar and template of reinforced concrete girder,
The template of reinforced concrete girder will set embedded hole, a diameter of 14~16mm of embedded hole；
(3) reinforcing bar and template of oblique girder are installed, oblique girder sets embedded hole, a diameter of 14~16mm of embedded hole；
(4) concrete of reinforced concrete girder and oblique girder is poured；
(5) deformed bar perforation is drilled with side bar deformed bar set location, penetration hole diameter is 14~16mm；
(6) prestressed reinforcing bar, the outside protective layer of side bar is peeled off, pressure-bearing steel plate is welded on the reinforcing bar of side bar, in advance
Stress rib is fixed on pressure-bearing steel through side bar perforation and reinforced concrete girder embedded hole or oblique girder embedded hole through anchor slab
Plate；
(7) prestressed reinforcement of tensioning；Tension of prestressed tendon use lever type clamping instrument, the resistance arm of lever type clamping instrument with
The ratio of power arm is 0.05~0.15；Tension of prestressed tendon is transverse stretching, and tension of prestressed tendon is solid with fixing muscle after finishing
Fixed, presstressed reinforcing steel is welded with fixing muscle, and the space between the fixing hole of presstressed reinforcing steel and concrete girder uses high-strength ring
Oxygen tree fat is clogged；
(8) construction gunite concrete；
(9) carry out painting smooth below gunite concrete.
3. concrete floor ruggedized construction according to claim 1, it is characterized in that gunite concrete mixes basalt fibre,
Basalt fibre incorporation is 1.4%.
4. concrete floor ruggedized construction according to claim 2, it is characterized in that deformed bar tension sequence is using such as
Under：By the control tension stress of deformed bar initial tensioning to 10%, hold lotus 3min and set up primary stress, then be stretched to 50%
Tension stress is controlled, lotus 5min is held, is finally stretched to control tension stress, hold lotus 5min.
5. concrete floor ruggedized construction according to claim 2, it is characterized in that when jet thickness is, less than 25mm, to use
Screw spraying machine carries out spraying operation, and spraying machine wind pressure of work is controlled in 0.15~0.3MPa.When jet thickness be more than etc.
In 25mm, spraying operation is carried out using rotor spraying machine, wind pressure of work is controlled in 0.3~0.4MPa.
6. concrete floor ruggedized construction according to claim 2, it is characterized in that during construction of shotcrete nozzle with by
The distance and angle of spray plane, should constantly be adjusted with the fluctuation of blast；Nozzle is with the distance and angle by spray plane with blast
Parameter uses as follows,
Nozzle is with the distance and angle by spray plane with wind pressure parameter
When spraying machine wind pressure of work is in the range of upper table, using interpolation method determine nozzle with by spray plane distance and nozzle with
By the angle of spray plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710784608.1A CN107327157B (en) | 2017-09-04 | 2017-09-04 | Reinforced structure of concrete floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710784608.1A CN107327157B (en) | 2017-09-04 | 2017-09-04 | Reinforced structure of concrete floor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107327157A true CN107327157A (en) | 2017-11-07 |
| CN107327157B CN107327157B (en) | 2023-12-15 |
Family
ID=60204886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710784608.1A Active CN107327157B (en) | 2017-09-04 | 2017-09-04 | Reinforced structure of concrete floor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107327157B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592839A (en) * | 2017-03-03 | 2017-04-26 | 沈阳建筑大学 | Horizontal tensioning and external pre-stressing profiled steel sheet composite floor |
| CN107989396A (en) * | 2017-11-29 | 2018-05-04 | 浙江新中环建筑设计有限公司 | A kind of tiny Ti handing construction method |
| CN109457994A (en) * | 2018-11-19 | 2019-03-12 | 中国矿业大学 | A kind of erection method for adding armored concrete beam forms |
| CN109469349A (en) * | 2018-11-19 | 2019-03-15 | 中国矿业大学 | A kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam |
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2017
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592839A (en) * | 2017-03-03 | 2017-04-26 | 沈阳建筑大学 | Horizontal tensioning and external pre-stressing profiled steel sheet composite floor |
| CN107989396A (en) * | 2017-11-29 | 2018-05-04 | 浙江新中环建筑设计有限公司 | A kind of tiny Ti handing construction method |
| CN109457994A (en) * | 2018-11-19 | 2019-03-12 | 中国矿业大学 | A kind of erection method for adding armored concrete beam forms |
| CN109469349A (en) * | 2018-11-19 | 2019-03-15 | 中国矿业大学 | A kind of floor strengthening reconstruction method for adding reinforced concrete secondary beam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107327157B (en) | 2023-12-15 |
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Effective date of registration: 20231120 Address after: 234000 east side of Chujiang Avenue, Suma modern industrial park, Suzhou City, Anhui Province Applicant after: Anhui Jinda Building Materials Co.,Ltd. Address before: 325000 Jinchuan Road, Tianhe Street, Wenzhou Economic and Technological Development Zone, Wenzhou City, Zhejiang Province Applicant before: Ye Changqing |
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